Weather Station Components

The weather station that I have assembled is based on the designs provided by Dallas Semiconductor as parts of their 1-Wire Weather Station. The weather station provides wireless remote monitoring of temperature, relative humidity, wind direction, wind speed, and rainfall.

System Control:

Backlit LCD Character Display

Three Button Control Interface

Power management:

20 Watt Solar Panel

12 Volt 21 Amp Hour Battery

Morningstar Sunsaver Solar Charge Controller     

6 Volt Switching Voltage Regulator

5 Volt Low Dropout Linear Voltage Regulators

System Processor:

Dallas Semiconductor TINI Networked Microcontroller

All sensors interface with the microcontroller using a 1-Wire bus. Modem is interfaced through a RS232 serial connection.

Wireless Communications:

MultiTech Systems MultiModem GPRS communicates with an Internet web server for data posting.

Lightning protection:

All sensors outside the main enclosure are protected by transient voltage suppressors to prevent damage from nearby lightning strikes. The whole system is grounded by 8 foot copper clad ground rods.

Sensors:

At 5ft Height

Sensirion SHT75 high-precision capacitive humidity and temperature sensor

Honeywell HIH-4000 series humidity sensor

Dallas Semiconductor DS18S20 Digital Thermometer

Temperature and humidity sensors are aspirated by an electric fan and enclosed in a Davis Instruments Solar Radiation Shield

Davis Instruments 7852 Rain Gauge

At 33ft Height

TAI8515 1-Wire Weather Instrument provides wind speed, wind direction, and temperature measurements

Photos of the Components:

This is a photo of the enclosure where the system processor, LCD display, system battery, solar charge controller, and modem are installed.

This is a photo of the radiation shield which encloses temperature and humidity sensors.

This is a photo of the disassembled rain gauge with electronics installed.

This is a photo the the anemometer

By: William Anderson
Modified: 4-9-2008